30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths
Roll over image to zoom in Click on image to zoom
30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths

30mm Dual Wall Heat Shrink Tubing 3:1 Ratio Adhesive Lined Waterproof — Multiple Colors & Lengths

HomeDIYer
No reviews

By HomeDIYer®

Price:
$7.19 USD
Stock:
In stock (500 units), ready to be shipped

Payment & Security

Ach Direct Debit Amazon American Express Apple Pay Bancontact Diners Club Discover Google Pay iDEAL Wero Mastercard PayPal Shop Pay USDC Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

Quantity Discount Promotion
🎯 BULK DISCOUNT: Buy More, Save More!
Buy 2 Items
5% OFF
Buy 4 Items
10% OFF
Buy 6 Items
15% OFF
✅ Auto-discount • 🔄 Mix & match
Expert

DIY Expert Support

Get fitment advice & recommendations

Mon-Fri, 8:30AM-8PM
WhatsApp WhatsApp Email
⚡
24-Hour Fast Ship
🚚
Arrives in 3-14 days
🌍
Global Reach
↩️
30-Day Returns
🌱 1 tree planted with every purchase

Description

 

30mm Dual Wall Heat Shrink Tubing — Waterproof Adhesive Lined Protection for Large-Gauge Cables

When you're splicing heavy wiring in an engine bay, sealing a marine cable run, or protecting a large connector bundle from moisture and abrasion, standard single-wall tubing simply doesn't cut it. This 30mm dual wall heat shrink tubing is built for DIYers, auto electricians, marine installers, and industrial technicians who need a reliable, long-lasting seal on larger cables and connectors.

Each roll features a two-layer construction: a flexible polyolefin outer wall with a 3:1 shrink ratio, and a hot-melt adhesive inner lining that flows and bonds when heat is applied. The inner diameter is φ30mm before shrinking, reducing to approximately φ10mm after full shrinkage. Available in lengths of 1m (≈3.3 ft), 2m (≈6.6 ft), 5m (≈16.4 ft), and 10m (≈32.8 ft), and in seven colors — Black, White, Red, Green, Yellow, Blue, and Transparent — to suit color-coding and identification needs.

Typical use cases include waterproofing automotive wiring harness splices, sealing cable ends on boat and RV electrical systems, protecting large-gauge battery cables and ground straps, and bundling conduit terminations in outdoor electrical enclosures — all scenarios where a moisture-resistant heat shrink sleeve for large cables is essential.

ℹ️ Compatibility Note: This tubing fits cables and connectors with an outer diameter of approximately 10–28mm. Always measure your cable's OD before ordering. Inner diameter before shrinking: φ30mm. Minimum shrink diameter: approximately φ10mm (3:1 ratio).

✅ Key Features of These 30mm Dual Wall Heat Shrink Tubes

  • 🔥3:1 Shrink Ratio — Shrinks from φ30mm down to approximately φ10mm, accommodating a wider range of cable diameters than standard 2:1 tubing — ideal for uneven or stepped connections.
  • 💧Adhesive Inner Lining — The hot-melt adhesive layer melts and flows during shrinking, creating a waterproof, moisture-resistant bond directly to the cable jacket — critical for marine, automotive, and outdoor wiring.
  • 🛡️Dual Wall Construction — The outer polyolefin layer provides mechanical protection against abrasion, UV exposure, and chemical contact, while the inner adhesive layer seals against water ingress.
  • 🎨7 Color Options — Available in Black, White, Red, Green, Yellow, Blue, and Transparent for easy circuit identification and color-coded wiring harness organization.
  • 📏Flexible Length Selection — Choose from 1m, 2m, 5m, or 10m rolls to match your project scale — from single-splice repairs to bulk wiring jobs on vehicles or equipment.
  • ⚡Broad Application Range — Suitable for automotive wiring harness protection, marine cable sealing, battery cable insulation, and industrial conduit terminations where a durable adhesive-lined heat shrink sleeve is required.

📐 Technical Specifications — Dual Wall Adhesive Lined Heat Shrink Tubing

Inner Diameter (Before Shrink) φ30mm (≈1.18")
Minimum Shrink Diameter (After) Approximately φ10mm (≈0.39") — 3:1 ratio
Shrink Ratio 3:1
Wall Construction Dual wall — polyolefin outer + hot-melt adhesive inner
Available Lengths 1m (≈3.3 ft) / 2m (≈6.6 ft) / 5m (≈16.4 ft) / 10m (≈32.8 ft)
Available Colors Black, White, Red, Green, Yellow, Blue, Transparent
Shrink Temperature See variant options — typically 120–150°C (250–300°F); confirm with heat gun settings
Operating Temperature Range Contact us to confirm exact rated range for your application
Material — Outer Wall Polyolefin
Material — Inner Wall Hot-melt adhesive (thermoplastic)
Suitable Cable OD Range Approximately 10–28mm (contact us to confirm for edge cases)
Recommended Application Tool Heat gun (lighter or hair dryer not recommended)
⚠️ Tip: For best results, always verify your cable's outer diameter against the tubing's shrink range before installation. If you're unsure which size or length is right for your project, contact us before ordering.

❓ Frequently Asked Questions

How do I choose the right length of heat shrink tubing?

Measure the total length of the wire, cable, or connector you need to cover, then add at least 10–15% extra for overlap and trimming. Available lengths are 1m (≈3.3 ft), 2m (≈6.6 ft), 5m (≈16.4 ft), and 10m (≈32.8 ft). For longer runs or bulk projects, the 5m or 10m rolls typically offer better value per meter.

What does 3:1 shrink ratio mean, and why does it matter?

A 3:1 shrink ratio means the tubing shrinks to one-third of its original diameter when heat is applied. This allows the 30mm tubing to shrink down to approximately 10mm, making it suitable for a wider range of cable diameters compared to standard 2:1 tubing — particularly useful for stepped or irregular connections.

Is this heat shrink tubing waterproof and suitable for outdoor use?

Yes. The dual wall construction features an inner adhesive lining that melts and flows when heated, creating a moisture-resistant seal around the cable. This makes it generally suitable for outdoor, marine, and automotive applications where moisture ingress is a concern. For fully submerged or high-pressure water exposure, contact us to confirm suitability.

What is the inner adhesive lining made of, and how does it work?

The inner wall is typically a hot-melt adhesive (thermoplastic) layer. When you apply heat — generally with a heat gun at around 120–150°C (250–300°F) — the adhesive melts and bonds to the cable jacket, while the outer polyolefin layer shrinks tightly around it, forming a secure, sealed connection.

What cables or connectors is 30mm heat shrink tubing compatible with?

The φ30mm inner diameter (before shrinking) is generally compatible with cable bundles, large-gauge wiring, conduit ends, and connectors in the roughly 10–28mm outer diameter range. Always measure your cable's outer diameter before selecting a size to ensure a proper fit after shrinking.

Can I use a lighter or hair dryer instead of a heat gun?

A heat gun is strongly recommended for dual wall adhesive-lined tubing. Lighters can cause uneven shrinking or scorching, and hair dryers typically do not reach the temperatures needed to fully activate the inner adhesive layer. For best results, use a heat gun set to the appropriate temperature range.

Does the color affect performance, or is it purely cosmetic?

Color is primarily for identification and organization — for example, color-coding wiring harnesses or marking specific circuits. All color variants share the same 3:1 shrink ratio, dual wall construction, and adhesive lining. Performance is consistent across all colors.

🛒 Select your color and length above, then add to cart — ships from our US warehouse.

You may also like

Recently viewed